Alert archive / Nebraska / Special Weather Statements in 2019

Special Weather Statement, NWS North Platte, NE

August 4, 2019Thomas County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 4, 2019, 7:37 PM CDT for Thomas County, Nebraska. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 4, 2019, 7:37 PM CDT (00:37 UTC)
Expired
Aug 4, 2019, 8:30 PM CDT
In force
53 min
Issued by
NWS North Platte, NE

County Thomas County, NE

The radar

The North Platte radar (KLNX), 7 km from the middle of the area, began a volume at 00:39 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.6 hours before the alert went out and 89 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2019-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 641 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2019-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
641 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
2202 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS North Platte, NE wrote its last area forecast discussion before this special weather statement went out at Aug 4, 6:47 PM CDT, 50 minutes earlier.

Area forecast discussion, Aug 4, 6:47 PM CDT, 50 minutes before
Area Forecast Discussion
National Weather Service North Platte NE
647 PM CDT Sun Aug 4 2019

.SHORT TERM...(This evening through Monday night)
Issued at 352 PM CDT Sun Aug 4 2019

The main concern this forecast period is thunderstorm development
this afternoon and evening. Thunderstorms will continue to
develop across northwest Nebraska this afternoon. There is some
inconsistencies with the models in how far eastward the
thunderstorms will sustain themselves. Leaned more with HRRR and
HREF where storms will form into a cluster across northern
Nebraska and drop southeastward but should enter a less favorable
environment and will begin to diminish before reaching portions
of southwest and central Nebraska.

Storms that occur late this afternoon and evening have the
potential to become strong to severe, with the main hazards being
strong winds, large hail and heavy rain potential. The best chance
for severe thunderstorms will be across northwestern Nebraska,
mainly along and west of a line from Kilgore to Ellsworth.

A cold front will push through the area on Monday. There is a
chance of thunderstorms Monday afternoon and evening in
association with the cold front. At this time the severe threat
looks to be marginal as storms may develop behind the cold front
in a less favorable environment for severe storms but with the
amount of moister in the area could have the potential for heavy
rainfall.

.LONG TERM...(Tuesday through Sunday)
Issued at 352 PM CDT Sun Aug 4 2019

Surface high pressure will sit over the Central Plains Tuesday
into Wednesday before a frontal boundary moves through the area
Wednesday evening. Highs will remain seasonal in the 80s, with
slight chances of thunderstorms on Tuesday afternoon and evening.
A better chance of widespread thunderstorms will be Wednesday
afternoon in association with the cold front. Cooler temperatures
on Thursday and Friday with highs only in the upper 70s to low
80s. There will be a chance of thunderstorms Thursday through
Sunday.

&&

.AVIATION...(For the 00Z TAFS through 00Z Monday evening)
Issued at 643 PM CDT Sun Aug 4 2019

Scattered thunderstorms across the central Sandhills to near VTN
will continue to push south and east this evening. Expect quickly
improving conditions at VTN with return to VFR by 05/01z. Rain and
storms will move into TIF/ANW/ONL areas by 05/02-04z timeframe and
be capable of brief strong winds up to 35 knots and visibility
less than 1 mile with RA+. Confidence in impacts at LBF are low at
the moment so have limited wording to VCSH for now with possible
amendments to come later.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM...Gomez
LONG TERM...Gomez
AVIATION...Jurgensen
Hazardous weather outlook, Aug 4, 3:40 PM CDT, 3 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service North Platte NE
340 PM CDT Sun Aug 4 2019

NEZ004>010-022>029-035>038-056>059-069>071-094-052045-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
340 PM CDT Sun Aug 4 2019 /240 PM MDT Sun Aug 4 2019/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.

.DAY ONE...TONIGHT.

Scattered thunderstorms across the northwest Sandhills, mainly
northwest of a line from Valentine through Thedford and Ellsworth
will be capable of producing large hail, strong wind gusts and
heavy rainfall this evening. Thunderstorms will track further
southeastward this evening into the Sandhills and portions of
southwest Nebraska and may produce small hail, gusty winds and
brief heavy rain.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

Additional scattered thunderstorms will move southeast across the
area Monday afternoon and evening. A few of these could be
severe.

An active pattern will bring chances for thunderstorms through
much of the week Tuesday through Saturday. Later forecasts will
determine any severe threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated through tonight.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

Roberg

In the hours before

Local storm report, Aug 4, 6:33 PM CDT, 1 hour 4 minutes before
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Local storm report, Aug 4, 6:35 PM CDT, 1 hour 2 minutes before
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Special weather statement, Aug 4, 6:45 PM CDT, 52 minutes before
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Special weather statement, Aug 4, 6:47 PM CDT, 50 minutes before
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Local storm report, Aug 4, 6:58 PM CDT, 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
658 PM CDT SUN AUG 4 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0642 PM     NON-TSTM WND GST VALENTINE               42.87N 100.55W
08/04/2019  M56 MPH          CHERRY             NE   ASOS

            ASOS STATION KVTN VALENTINE AIRPORT.

&&
Special weather statement, Aug 4, 7:37 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service North Platte NE
737 PM CDT Sun Aug 4 2019

NEZ005-024>026-036-037-094-050130-
Eastern Cherry NE-Hooker NE-McPherson NE-Western Cherry NE-Thomas NE-
Blaine NE-Logan NE-
737 PM CDT Sun Aug 4 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHERRY...EAST
CENTRAL HOOKER...NORTHWESTERN LOGAN...NORTHEASTERN MCPHERSON...WEST
CENTRAL BLAINE AND THOMAS COUNTIES UNTIL 830 PM CDT/730 PM MDT/...

At 737 PM CDT/637 PM MDT/, Doppler radar was tracking a strong
thunderstorm near Seneca, or 9 miles west of Thedford, moving
southeast at 25 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Thedford, Halsey, Highway 83 crossing The Dismal River, Natwick and
Norway.

This includes the following highways...
 Highway 2 between mile markers 197 and 228.
 Highway 83 between mile markers 127 and 158.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4197 10090 4216 10066 4196 10017 4159 10063
TIME...MOT...LOC 0037Z 319DEG 24KT 4202 10075

Buttler

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 4, 7:24 PM CDTFlash Flood WarningLBFBrown, Cherry, Keya Paha3 hr
Aug 4, 7:42 PM CDTSpecial Weather StatementLBFKeya Paha33 min
Aug 4, 7:58 PM CDTSpecial Weather StatementLBFArthur47 min
Aug 4, 8:15 PM CDTSpecial Weather StatementLBFLogan30 min
Aug 4, 8:25 PM CDTSpecial Weather StatementLBFKeith50 min
Aug 4, 8:38 PM CDTSevere Thunderstorm WarningLBFKeith, Lincoln, Perkins37 min
Aug 4, 9:17 PM CDTSevere Thunderstorm WarningLBFArthur, Keith, Lincoln, McPherson24 min
Aug 5, 3:32 AM CDTSpecial Weather StatementLBFKeith28 min
Aug 5, 3:43 AM CDTSpecial Weather StatementLBFPerkins32 min
Aug 5, 4:02 AM CDTSpecial Weather StatementLBFKeith43 min
Aug 5, 6:48 PM CDTSpecial Weather StatementLBFMcPherson42 min

Nearby

Special Weather Statements in Nebraska, 2019Every special weather statement in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.